Construction impacts and mitigation
Being a good neighbor during construction
WSDOT and Graham recognize that people living or working along the frontline and traveling through a complex project are those most affected by the work. While some effects of SR 520 construction are unavoidable, we strive to minimize effects on neighbors as much as possible.
WSDOT and Graham are implementing the following measures for neighbors and those traveling through Montlake:
- Contractor performance incentives to go above and beyond community, mobility, and environmental contract requirements.
- Visual screening through the installation of fencing and planting of fast-growing trees.
- Noise dampening through the installation of Acoustifence materials in the Shelby-Hamlin area.
- Full-time Community Liaison/Ombudsman.
- Dust control (e.g., site watering).
- Minimized disruptions to neighborhood street access.
- WSDOT drop-in information center office in Montlake where the public can learn about the project, ask questions, and discuss concerns directly with project staff.
- 24-hour noise and vibration monitoring program.
- 24-hour hotline: 206-775-8885.
Nighttime construction during SR 520 Montlake Project
Graham will perform nighttime work under a City of Seattle-approved Major Public Project Construction Noise Variance. The variance sets limits for nighttime construction noise for the duration of construction.
Nighttime hours when variance is applicable:
Weekdays: 10 p.m. to 7 a.m. | Weekends and holidays: 10 p.m. to 9 a.m.
Some residents in the Montlake and Madison Park neighborhoods may notice vibrations when crews perform certain work during Montlake Project construction.
If you suspect property damage from construction vibration, please notify the project team by calling the 24-hour construction hotline: 206-775-8885.
Closures and detours
Types of closures
Types of detours
Keeping SR 520 traffic moving during construction
As crews start removing the old west approach bridge to build the West Approach Bridge South, all SR 520 traffic will shift onto the new West Approach Bridge North structure. During this interim construction period, the West Approach Bridge North structure will carry eastbound and westbound highway traffic.
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Mainline construction area
SR 520 Trail
Maintaining transit access during construction
Montlake Project construction activities will cause traffic and transportation disruptions due to adjustments in existing roadways, temporary closures, detours, and changes to pedestrian and bicycle access through the area.
Existing Montlake flyer stops to close June 22, 2019
- To prioritize rider safety and reliable access to transit, WSDOT, King County Metro, Sound Transit and Seattle DOT have determined that it’s necessary to close the highway-level flyer stops in Montlake during construction.
- Bus stops will remain open and operational on Montlake Boulevard and at the Montlake Triangle/U-Link area.
- There are almost 30,000 transit trips per weekday and about 6,000 per weekend day in the SR 520 corridor. About 700 of these daily trips use the SR 520 freeway flyer stops – approximately 2% of the total SR 520 weekday transit ridership.
Transit service upon completion of the Montlake Project
When complete, the Montlake lid will include new:
- Multimodal transportation hub.
- Local and regional bus stops.
- Direct-access transit/HOV ramps between Montlake and the Eastside.
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Click image to magnify.
Staging areas and haul routes
Our goal is to keep the majority of haul-route traffic on I-5 and SR 520. There will be times when Graham must use city streets as haul routes because primary routes are not available or feasible. In these cases, Graham may use City-identified truck routes. Graham will obtain appropriate approvals and permits from the City of Seattle, as needed, and follow City of Seattle legal limits on vehicle weight, height and width. Some equipment and materials will be transported by barge via area waterways.